You need to have Samsung Tool or LG Tool activated in order to buy credits.
Depending on which phones you plan to unlock.
You can buy new credit account or refill credits to an existing one you have. Inform your sales manager about it while ordering the item. Otherwise, the system will automatically create a new account for z3x credits.
Here is reseller list :
GsmEasy
Country: China, Hong Kong
Web https://www.imei.us . ( Instant Avalable Z3x Unlock Credits)
Web https://www.gsmeasyshop.com
E-mail info.gsmeasy@gmail.com
Phone 8613926070786
Skype gsmeasy
WhatsUp 008613926070786
QQ 414671997
Sonork 100.1576815
GsmServer
Country: Hong Kong and WorldWide
Web https://www.gsmserver.com . (Buy Z3x Unlock Credits Online)
E-mail info.gsmserver.com
Phone: +85239733882
Skype: gsmserver.com, sonnka123456, ventasgsm.es
WhatsUp/viber:
+380671258752
+380677470832
+380730019516
Sonork: 100.85899, 100.1587356,
100.106806
SimSim Electronics LLC
location: Dubai, UAE
Phone: +971 4 2727113
ICQ: 129081860
Sonork: 100.37251
E-mail: hamsfazil @ gmail.com
Skype: hams.fazil
GsmSalman
Country: Pakistan, UAE "Dubai"
Contact person Muhammad Salman
Web http://www.gsmfastest.com
E-mail admin@gsmfastest.com
Phone +923007859995
Skype GsmSalman
WhatsUp +923007859995
Viber +923007859995
Sonork 100.1601293